The grub boot menu is displayed. sometimes, after linux is installed, the boot menu cannot be displayed when it is started, because the menu is hidden in the system settings. The following describes how to display the menu: 1. edit the/etc/default/grub file and comment out the line GRUB_HIDDEN_TIMEOUT0. 2. use updat... the grub boot menu is displayed. sometimes, after linux is installed, the boot menu cannot be displayed when it is started, because the menu is hidden in the system settings. The following describes how to display the menu: 1. edit the/etc/default/grub file and comment out the line GRUB_HIDDEN_TIMEOUT = 0. 2. use the update-grub command to update the configuration root @ yanwenjie-vm:/home/yan # update-grubGenerating grub. cfg... found linux image:/boot/vmlinuz-3.5.0-23-genericFound initrd image:/boot/initrd. the img-3.5.0-23-genericFound memtest86 + image:/boot/memtest86 +. when you see done, bindone indicates that the modification is successful, restarted, and the boot menu is displayed normally.
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